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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2008 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.base;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import static com.google.common.base.Preconditions.checkArgument;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import com.google.common.annotations.Beta;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import com.google.common.annotations.GwtCompatible;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import com.google.common.annotations.GwtIncompatible;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.Arrays;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.BitSet;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>import javax.annotation.CheckReturnValue;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>/**<a name="line.31"></a>
<span class="sourceLineNo">032</span> * Determines a true or false value for any Java {@code char} value, just as {@link Predicate} does<a name="line.32"></a>
<span class="sourceLineNo">033</span> * for any {@link Object}. Also offers basic text processing methods based on this function.<a name="line.33"></a>
<span class="sourceLineNo">034</span> * Implementations are strongly encouraged to be side-effect-free and immutable.<a name="line.34"></a>
<span class="sourceLineNo">035</span> *<a name="line.35"></a>
<span class="sourceLineNo">036</span> * &lt;p&gt;Throughout the documentation of this class, the phrase "matching character" is used to mean<a name="line.36"></a>
<span class="sourceLineNo">037</span> * "any character {@code c} for which {@code this.matches(c)} returns {@code true}".<a name="line.37"></a>
<span class="sourceLineNo">038</span> *<a name="line.38"></a>
<span class="sourceLineNo">039</span> * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; This class deals only with {@code char} values; it does not understand<a name="line.39"></a>
<span class="sourceLineNo">040</span> * supplementary Unicode code points in the range {@code 0x10000} to {@code 0x10FFFF}. Such logical<a name="line.40"></a>
<span class="sourceLineNo">041</span> * characters are encoded into a {@code String} using surrogate pairs, and a {@code CharMatcher}<a name="line.41"></a>
<span class="sourceLineNo">042</span> * treats these just as two separate characters.<a name="line.42"></a>
<span class="sourceLineNo">043</span> *<a name="line.43"></a>
<span class="sourceLineNo">044</span> * &lt;p&gt;Example usages: &lt;pre&gt;<a name="line.44"></a>
<span class="sourceLineNo">045</span> *   String trimmed = {@link #WHITESPACE WHITESPACE}.{@link #trimFrom trimFrom}(userInput);<a name="line.45"></a>
<span class="sourceLineNo">046</span> *   if ({@link #ASCII ASCII}.{@link #matchesAllOf matchesAllOf}(s)) { ... }&lt;/pre&gt;<a name="line.46"></a>
<span class="sourceLineNo">047</span> *<a name="line.47"></a>
<span class="sourceLineNo">048</span> * &lt;p&gt;See the Guava User Guide article on &lt;a href=<a name="line.48"></a>
<span class="sourceLineNo">049</span> * "http://code.google.com/p/guava-libraries/wiki/StringsExplained#CharMatcher"&gt;<a name="line.49"></a>
<span class="sourceLineNo">050</span> * {@code CharMatcher}&lt;/a&gt;.<a name="line.50"></a>
<span class="sourceLineNo">051</span> *<a name="line.51"></a>
<span class="sourceLineNo">052</span> * @author Kevin Bourrillion<a name="line.52"></a>
<span class="sourceLineNo">053</span> * @since 1.0<a name="line.53"></a>
<span class="sourceLineNo">054</span> */<a name="line.54"></a>
<span class="sourceLineNo">055</span>@Beta // Possibly change from chars to code points; decide constants vs. methods<a name="line.55"></a>
<span class="sourceLineNo">056</span>@GwtCompatible(emulated = true)<a name="line.56"></a>
<span class="sourceLineNo">057</span>public abstract class CharMatcher implements Predicate&lt;Character&gt; {<a name="line.57"></a>
<span class="sourceLineNo">058</span>  // Constants<a name="line.58"></a>
<span class="sourceLineNo">059</span>  /**<a name="line.59"></a>
<span class="sourceLineNo">060</span>   * Determines whether a character is a breaking whitespace (that is, a whitespace which can be<a name="line.60"></a>
<span class="sourceLineNo">061</span>   * interpreted as a break between words for formatting purposes). See {@link #WHITESPACE} for a<a name="line.61"></a>
<span class="sourceLineNo">062</span>   * discussion of that term.<a name="line.62"></a>
<span class="sourceLineNo">063</span>   *<a name="line.63"></a>
<span class="sourceLineNo">064</span>   * @since 2.0<a name="line.64"></a>
<span class="sourceLineNo">065</span>   */<a name="line.65"></a>
<span class="sourceLineNo">066</span>  public static final CharMatcher BREAKING_WHITESPACE =<a name="line.66"></a>
<span class="sourceLineNo">067</span>      anyOf("\t\n\013\f\r \u0085\u1680\u2028\u2029\u205f\u3000")<a name="line.67"></a>
<span class="sourceLineNo">068</span>          .or(inRange('\u2000', '\u2006'))<a name="line.68"></a>
<span class="sourceLineNo">069</span>          .or(inRange('\u2008', '\u200a'))<a name="line.69"></a>
<span class="sourceLineNo">070</span>          .withToString("CharMatcher.BREAKING_WHITESPACE")<a name="line.70"></a>
<span class="sourceLineNo">071</span>          .precomputed();<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>  /**<a name="line.73"></a>
<span class="sourceLineNo">074</span>   * Determines whether a character is ASCII, meaning that its code point is less than 128.<a name="line.74"></a>
<span class="sourceLineNo">075</span>   */<a name="line.75"></a>
<span class="sourceLineNo">076</span>  public static final CharMatcher ASCII = inRange('\0', '\u007f', "CharMatcher.ASCII");<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span>  /**<a name="line.78"></a>
<span class="sourceLineNo">079</span>   * Determines whether a character is a digit according to<a name="line.79"></a>
<span class="sourceLineNo">080</span>   * &lt;a href="http://unicode.org/cldr/utility/list-unicodeset.jsp?a=%5Cp%7Bdigit%7D"&gt;Unicode&lt;/a&gt;.<a name="line.80"></a>
<span class="sourceLineNo">081</span>   */<a name="line.81"></a>
<span class="sourceLineNo">082</span>  public static final CharMatcher DIGIT;<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span>  static {<a name="line.84"></a>
<span class="sourceLineNo">085</span>    CharMatcher digit = inRange('0', '9');<a name="line.85"></a>
<span class="sourceLineNo">086</span>    String zeroes =<a name="line.86"></a>
<span class="sourceLineNo">087</span>        "\u0660\u06f0\u07c0\u0966\u09e6\u0a66\u0ae6\u0b66\u0be6\u0c66"<a name="line.87"></a>
<span class="sourceLineNo">088</span>            + "\u0ce6\u0d66\u0e50\u0ed0\u0f20\u1040\u1090\u17e0\u1810\u1946"<a name="line.88"></a>
<span class="sourceLineNo">089</span>            + "\u19d0\u1b50\u1bb0\u1c40\u1c50\ua620\ua8d0\ua900\uaa50\uff10";<a name="line.89"></a>
<span class="sourceLineNo">090</span>    for (char base : zeroes.toCharArray()) {<a name="line.90"></a>
<span class="sourceLineNo">091</span>      digit = digit.or(inRange(base, (char) (base + 9)));<a name="line.91"></a>
<span class="sourceLineNo">092</span>    }<a name="line.92"></a>
<span class="sourceLineNo">093</span>    DIGIT = digit.withToString("CharMatcher.DIGIT").precomputed();<a name="line.93"></a>
<span class="sourceLineNo">094</span>  }<a name="line.94"></a>
<span class="sourceLineNo">095</span><a name="line.95"></a>
<span class="sourceLineNo">096</span>  /**<a name="line.96"></a>
<span class="sourceLineNo">097</span>   * Determines whether a character is a digit according to {@link Character#isDigit(char) Java's<a name="line.97"></a>
<span class="sourceLineNo">098</span>   * definition}. If you only care to match ASCII digits, you can use {@code inRange('0', '9')}.<a name="line.98"></a>
<span class="sourceLineNo">099</span>   */<a name="line.99"></a>
<span class="sourceLineNo">100</span>  public static final CharMatcher JAVA_DIGIT = new CharMatcher("CharMatcher.JAVA_DIGIT") {<a name="line.100"></a>
<span class="sourceLineNo">101</span>    @Override public boolean matches(char c) {<a name="line.101"></a>
<span class="sourceLineNo">102</span>      return Character.isDigit(c);<a name="line.102"></a>
<span class="sourceLineNo">103</span>    }<a name="line.103"></a>
<span class="sourceLineNo">104</span>  };<a name="line.104"></a>
<span class="sourceLineNo">105</span><a name="line.105"></a>
<span class="sourceLineNo">106</span>  /**<a name="line.106"></a>
<span class="sourceLineNo">107</span>   * Determines whether a character is a letter according to {@link Character#isLetter(char) Java's<a name="line.107"></a>
<span class="sourceLineNo">108</span>   * definition}. If you only care to match letters of the Latin alphabet, you can use {@code<a name="line.108"></a>
<span class="sourceLineNo">109</span>   * inRange('a', 'z').or(inRange('A', 'Z'))}.<a name="line.109"></a>
<span class="sourceLineNo">110</span>   */<a name="line.110"></a>
<span class="sourceLineNo">111</span>  public static final CharMatcher JAVA_LETTER = new CharMatcher("CharMatcher.JAVA_LETTER") {<a name="line.111"></a>
<span class="sourceLineNo">112</span>    @Override public boolean matches(char c) {<a name="line.112"></a>
<span class="sourceLineNo">113</span>      return Character.isLetter(c);<a name="line.113"></a>
<span class="sourceLineNo">114</span>    }<a name="line.114"></a>
<span class="sourceLineNo">115</span>  };<a name="line.115"></a>
<span class="sourceLineNo">116</span><a name="line.116"></a>
<span class="sourceLineNo">117</span>  /**<a name="line.117"></a>
<span class="sourceLineNo">118</span>   * Determines whether a character is a letter or digit according to {@link<a name="line.118"></a>
<span class="sourceLineNo">119</span>   * Character#isLetterOrDigit(char) Java's definition}.<a name="line.119"></a>
<span class="sourceLineNo">120</span>   */<a name="line.120"></a>
<span class="sourceLineNo">121</span>  public static final CharMatcher JAVA_LETTER_OR_DIGIT =<a name="line.121"></a>
<span class="sourceLineNo">122</span>      new CharMatcher("CharMatcher.JAVA_LETTER_OR_DIGIT") {<a name="line.122"></a>
<span class="sourceLineNo">123</span>    @Override public boolean matches(char c) {<a name="line.123"></a>
<span class="sourceLineNo">124</span>      return Character.isLetterOrDigit(c);<a name="line.124"></a>
<span class="sourceLineNo">125</span>    }<a name="line.125"></a>
<span class="sourceLineNo">126</span>  };<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span>  /**<a name="line.128"></a>
<span class="sourceLineNo">129</span>   * Determines whether a character is upper case according to {@link Character#isUpperCase(char)<a name="line.129"></a>
<span class="sourceLineNo">130</span>   * Java's definition}.<a name="line.130"></a>
<span class="sourceLineNo">131</span>   */<a name="line.131"></a>
<span class="sourceLineNo">132</span>  public static final CharMatcher JAVA_UPPER_CASE =<a name="line.132"></a>
<span class="sourceLineNo">133</span>      new CharMatcher("CharMatcher.JAVA_UPPER_CASE") {<a name="line.133"></a>
<span class="sourceLineNo">134</span>    @Override public boolean matches(char c) {<a name="line.134"></a>
<span class="sourceLineNo">135</span>      return Character.isUpperCase(c);<a name="line.135"></a>
<span class="sourceLineNo">136</span>    }<a name="line.136"></a>
<span class="sourceLineNo">137</span>  };<a name="line.137"></a>
<span class="sourceLineNo">138</span><a name="line.138"></a>
<span class="sourceLineNo">139</span>  /**<a name="line.139"></a>
<span class="sourceLineNo">140</span>   * Determines whether a character is lower case according to {@link Character#isLowerCase(char)<a name="line.140"></a>
<span class="sourceLineNo">141</span>   * Java's definition}.<a name="line.141"></a>
<span class="sourceLineNo">142</span>   */<a name="line.142"></a>
<span class="sourceLineNo">143</span>  public static final CharMatcher JAVA_LOWER_CASE =<a name="line.143"></a>
<span class="sourceLineNo">144</span>      new CharMatcher("CharMatcher.JAVA_LOWER_CASE") {<a name="line.144"></a>
<span class="sourceLineNo">145</span>    @Override public boolean matches(char c) {<a name="line.145"></a>
<span class="sourceLineNo">146</span>      return Character.isLowerCase(c);<a name="line.146"></a>
<span class="sourceLineNo">147</span>    }<a name="line.147"></a>
<span class="sourceLineNo">148</span>  };<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
<span class="sourceLineNo">150</span>  /**<a name="line.150"></a>
<span class="sourceLineNo">151</span>   * Determines whether a character is an ISO control character as specified by {@link<a name="line.151"></a>
<span class="sourceLineNo">152</span>   * Character#isISOControl(char)}.<a name="line.152"></a>
<span class="sourceLineNo">153</span>   */<a name="line.153"></a>
<span class="sourceLineNo">154</span>  public static final CharMatcher JAVA_ISO_CONTROL =<a name="line.154"></a>
<span class="sourceLineNo">155</span>      inRange('\u0000', '\u001f')<a name="line.155"></a>
<span class="sourceLineNo">156</span>      .or(inRange('\u007f', '\u009f'))<a name="line.156"></a>
<span class="sourceLineNo">157</span>      .withToString("CharMatcher.JAVA_ISO_CONTROL");<a name="line.157"></a>
<span class="sourceLineNo">158</span><a name="line.158"></a>
<span class="sourceLineNo">159</span>  /**<a name="line.159"></a>
<span class="sourceLineNo">160</span>   * Determines whether a character is invisible; that is, if its Unicode category is any of<a name="line.160"></a>
<span class="sourceLineNo">161</span>   * SPACE_SEPARATOR, LINE_SEPARATOR, PARAGRAPH_SEPARATOR, CONTROL, FORMAT, SURROGATE, and<a name="line.161"></a>
<span class="sourceLineNo">162</span>   * PRIVATE_USE according to ICU4J.<a name="line.162"></a>
<span class="sourceLineNo">163</span>   */<a name="line.163"></a>
<span class="sourceLineNo">164</span>  public static final CharMatcher INVISIBLE = inRange('\u0000', '\u0020')<a name="line.164"></a>
<span class="sourceLineNo">165</span>      .or(inRange('\u007f', '\u00a0'))<a name="line.165"></a>
<span class="sourceLineNo">166</span>      .or(is('\u00ad'))<a name="line.166"></a>
<span class="sourceLineNo">167</span>      .or(inRange('\u0600', '\u0604'))<a name="line.167"></a>
<span class="sourceLineNo">168</span>      .or(anyOf("\u06dd\u070f\u1680\u180e"))<a name="line.168"></a>
<span class="sourceLineNo">169</span>      .or(inRange('\u2000', '\u200f'))<a name="line.169"></a>
<span class="sourceLineNo">170</span>      .or(inRange('\u2028', '\u202f'))<a name="line.170"></a>
<span class="sourceLineNo">171</span>      .or(inRange('\u205f', '\u2064'))<a name="line.171"></a>
<span class="sourceLineNo">172</span>      .or(inRange('\u206a', '\u206f'))<a name="line.172"></a>
<span class="sourceLineNo">173</span>      .or(is('\u3000'))<a name="line.173"></a>
<span class="sourceLineNo">174</span>      .or(inRange('\ud800', '\uf8ff'))<a name="line.174"></a>
<span class="sourceLineNo">175</span>      .or(anyOf("\ufeff\ufff9\ufffa\ufffb"))<a name="line.175"></a>
<span class="sourceLineNo">176</span>      .withToString("CharMatcher.INVISIBLE")<a name="line.176"></a>
<span class="sourceLineNo">177</span>      .precomputed();<a name="line.177"></a>
<span class="sourceLineNo">178</span><a name="line.178"></a>
<span class="sourceLineNo">179</span>  /**<a name="line.179"></a>
<span class="sourceLineNo">180</span>   * Determines whether a character is single-width (not double-width). When in doubt, this matcher<a name="line.180"></a>
<span class="sourceLineNo">181</span>   * errs on the side of returning {@code false} (that is, it tends to assume a character is<a name="line.181"></a>
<span class="sourceLineNo">182</span>   * double-width).<a name="line.182"></a>
<span class="sourceLineNo">183</span>   *<a name="line.183"></a>
<span class="sourceLineNo">184</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; as the reference file evolves, we will modify this constant to keep it up to<a name="line.184"></a>
<span class="sourceLineNo">185</span>   * date.<a name="line.185"></a>
<span class="sourceLineNo">186</span>   */<a name="line.186"></a>
<span class="sourceLineNo">187</span>  public static final CharMatcher SINGLE_WIDTH = inRange('\u0000', '\u04f9')<a name="line.187"></a>
<span class="sourceLineNo">188</span>      .or(is('\u05be'))<a name="line.188"></a>
<span class="sourceLineNo">189</span>      .or(inRange('\u05d0', '\u05ea'))<a name="line.189"></a>
<span class="sourceLineNo">190</span>      .or(is('\u05f3'))<a name="line.190"></a>
<span class="sourceLineNo">191</span>      .or(is('\u05f4'))<a name="line.191"></a>
<span class="sourceLineNo">192</span>      .or(inRange('\u0600', '\u06ff'))<a name="line.192"></a>
<span class="sourceLineNo">193</span>      .or(inRange('\u0750', '\u077f'))<a name="line.193"></a>
<span class="sourceLineNo">194</span>      .or(inRange('\u0e00', '\u0e7f'))<a name="line.194"></a>
<span class="sourceLineNo">195</span>      .or(inRange('\u1e00', '\u20af'))<a name="line.195"></a>
<span class="sourceLineNo">196</span>      .or(inRange('\u2100', '\u213a'))<a name="line.196"></a>
<span class="sourceLineNo">197</span>      .or(inRange('\ufb50', '\ufdff'))<a name="line.197"></a>
<span class="sourceLineNo">198</span>      .or(inRange('\ufe70', '\ufeff'))<a name="line.198"></a>
<span class="sourceLineNo">199</span>      .or(inRange('\uff61', '\uffdc'))<a name="line.199"></a>
<span class="sourceLineNo">200</span>      .withToString("CharMatcher.SINGLE_WIDTH")<a name="line.200"></a>
<span class="sourceLineNo">201</span>      .precomputed();<a name="line.201"></a>
<span class="sourceLineNo">202</span><a name="line.202"></a>
<span class="sourceLineNo">203</span>  /** Matches any character. */<a name="line.203"></a>
<span class="sourceLineNo">204</span>  public static final CharMatcher ANY =<a name="line.204"></a>
<span class="sourceLineNo">205</span>      new FastMatcher("CharMatcher.ANY") {<a name="line.205"></a>
<span class="sourceLineNo">206</span>        @Override public boolean matches(char c) {<a name="line.206"></a>
<span class="sourceLineNo">207</span>          return true;<a name="line.207"></a>
<span class="sourceLineNo">208</span>        }<a name="line.208"></a>
<span class="sourceLineNo">209</span><a name="line.209"></a>
<span class="sourceLineNo">210</span>        @Override public int indexIn(CharSequence sequence) {<a name="line.210"></a>
<span class="sourceLineNo">211</span>          return (sequence.length() == 0) ? -1 : 0;<a name="line.211"></a>
<span class="sourceLineNo">212</span>        }<a name="line.212"></a>
<span class="sourceLineNo">213</span><a name="line.213"></a>
<span class="sourceLineNo">214</span>        @Override public int indexIn(CharSequence sequence, int start) {<a name="line.214"></a>
<span class="sourceLineNo">215</span>          int length = sequence.length();<a name="line.215"></a>
<span class="sourceLineNo">216</span>          Preconditions.checkPositionIndex(start, length);<a name="line.216"></a>
<span class="sourceLineNo">217</span>          return (start == length) ? -1 : start;<a name="line.217"></a>
<span class="sourceLineNo">218</span>        }<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span>        @Override public int lastIndexIn(CharSequence sequence) {<a name="line.220"></a>
<span class="sourceLineNo">221</span>          return sequence.length() - 1;<a name="line.221"></a>
<span class="sourceLineNo">222</span>        }<a name="line.222"></a>
<span class="sourceLineNo">223</span><a name="line.223"></a>
<span class="sourceLineNo">224</span>        @Override public boolean matchesAllOf(CharSequence sequence) {<a name="line.224"></a>
<span class="sourceLineNo">225</span>          checkNotNull(sequence);<a name="line.225"></a>
<span class="sourceLineNo">226</span>          return true;<a name="line.226"></a>
<span class="sourceLineNo">227</span>        }<a name="line.227"></a>
<span class="sourceLineNo">228</span><a name="line.228"></a>
<span class="sourceLineNo">229</span>        @Override public boolean matchesNoneOf(CharSequence sequence) {<a name="line.229"></a>
<span class="sourceLineNo">230</span>          return sequence.length() == 0;<a name="line.230"></a>
<span class="sourceLineNo">231</span>        }<a name="line.231"></a>
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<span class="sourceLineNo">255</span><a name="line.255"></a>
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<span class="sourceLineNo">260</span><a name="line.260"></a>
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<span class="sourceLineNo">264</span><a name="line.264"></a>
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<span class="sourceLineNo">268</span><a name="line.268"></a>
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<span class="sourceLineNo">285</span><a name="line.285"></a>
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<span class="sourceLineNo">290</span><a name="line.290"></a>
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<span class="sourceLineNo">293</span>          Preconditions.checkPositionIndex(start, length);<a name="line.293"></a>
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<span class="sourceLineNo">296</span><a name="line.296"></a>
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<span class="sourceLineNo">301</span><a name="line.301"></a>
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<span class="sourceLineNo">305</span><a name="line.305"></a>
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<span class="sourceLineNo">310</span><a name="line.310"></a>
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<span class="sourceLineNo">314</span><a name="line.314"></a>
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<span class="sourceLineNo">362</span><a name="line.362"></a>
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<span class="sourceLineNo">366</span><a name="line.366"></a>
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<span class="sourceLineNo">370</span><a name="line.370"></a>
<span class="sourceLineNo">371</span>      @Override public CharMatcher or(CharMatcher other) {<a name="line.371"></a>
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<span class="sourceLineNo">374</span><a name="line.374"></a>
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<span class="sourceLineNo">378</span><a name="line.378"></a>
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<span class="sourceLineNo">380</span>      @Override<a name="line.380"></a>
<span class="sourceLineNo">381</span>      void setBits(BitSet table) {<a name="line.381"></a>
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<span class="sourceLineNo">388</span>   * Returns a {@code char} matcher that matches any character except the one specified.<a name="line.388"></a>
<span class="sourceLineNo">389</span>   *<a name="line.389"></a>
<span class="sourceLineNo">390</span>   * &lt;p&gt;To negate another {@code CharMatcher}, use {@link #negate()}.<a name="line.390"></a>
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<span class="sourceLineNo">398</span><a name="line.398"></a>
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<span class="sourceLineNo">402</span><a name="line.402"></a>
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<span class="sourceLineNo">406</span><a name="line.406"></a>
<span class="sourceLineNo">407</span>      @GwtIncompatible("java.util.BitSet")<a name="line.407"></a>
<span class="sourceLineNo">408</span>      @Override<a name="line.408"></a>
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<span class="sourceLineNo">413</span><a name="line.413"></a>
<span class="sourceLineNo">414</span>      @Override public CharMatcher negate() {<a name="line.414"></a>
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<span class="sourceLineNo">420</span>  /**<a name="line.420"></a>
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<span class="sourceLineNo">423</span>   */<a name="line.423"></a>
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<span class="sourceLineNo">452</span><a name="line.452"></a>
<span class="sourceLineNo">453</span>      @GwtIncompatible("java.util.BitSet")<a name="line.453"></a>
<span class="sourceLineNo">454</span>      @Override void setBits(BitSet table) {<a name="line.454"></a>
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<span class="sourceLineNo">456</span>        table.set(match2);<a name="line.456"></a>
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<span class="sourceLineNo">464</span>   */<a name="line.464"></a>
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<span class="sourceLineNo">473</span>   *<a name="line.473"></a>
<span class="sourceLineNo">474</span>   * @throws IllegalArgumentException if {@code endInclusive &lt; startInclusive}<a name="line.474"></a>
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<span class="sourceLineNo">479</span>        Integer.toHexString(startInclusive) + ", " +<a name="line.479"></a>
<span class="sourceLineNo">480</span>        Integer.toHexString(endInclusive) + ")";<a name="line.480"></a>
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<span class="sourceLineNo">483</span><a name="line.483"></a>
<span class="sourceLineNo">484</span>  static CharMatcher inRange(final char startInclusive, final char endInclusive,<a name="line.484"></a>
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<span class="sourceLineNo">490</span><a name="line.490"></a>
<span class="sourceLineNo">491</span>      @GwtIncompatible("java.util.BitSet")<a name="line.491"></a>
<span class="sourceLineNo">492</span>      @Override void setBits(BitSet table) {<a name="line.492"></a>
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<span class="sourceLineNo">698</span>   *<a name="line.698"></a>
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<span class="sourceLineNo">1189</span>   *<a name="line.1189"></a>
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<span class="sourceLineNo">1249</span><a name="line.1249"></a>
<span class="sourceLineNo">1250</span>  // Predicate interface<a name="line.1250"></a>
<span class="sourceLineNo">1251</span><a name="line.1251"></a>
<span class="sourceLineNo">1252</span>  /**<a name="line.1252"></a>
<span class="sourceLineNo">1253</span>   * Equivalent to {@link #matches}; provided only to satisfy the {@link Predicate} interface. When<a name="line.1253"></a>
<span class="sourceLineNo">1254</span>   * using a reference of type {@code CharMatcher}, invoke {@link #matches} directly instead.<a name="line.1254"></a>
<span class="sourceLineNo">1255</span>   */<a name="line.1255"></a>
<span class="sourceLineNo">1256</span>  @Override public boolean apply(Character character) {<a name="line.1256"></a>
<span class="sourceLineNo">1257</span>    return matches(character);<a name="line.1257"></a>
<span class="sourceLineNo">1258</span>  }<a name="line.1258"></a>
<span class="sourceLineNo">1259</span><a name="line.1259"></a>
<span class="sourceLineNo">1260</span>  /**<a name="line.1260"></a>
<span class="sourceLineNo">1261</span>   * Returns a string representation of this {@code CharMatcher}, such as<a name="line.1261"></a>
<span class="sourceLineNo">1262</span>   * {@code CharMatcher.or(WHITESPACE, JAVA_DIGIT)}.<a name="line.1262"></a>
<span class="sourceLineNo">1263</span>   */<a name="line.1263"></a>
<span class="sourceLineNo">1264</span>  @Override<a name="line.1264"></a>
<span class="sourceLineNo">1265</span>  public String toString() {<a name="line.1265"></a>
<span class="sourceLineNo">1266</span>    return description;<a name="line.1266"></a>
<span class="sourceLineNo">1267</span>  }<a name="line.1267"></a>
<span class="sourceLineNo">1268</span><a name="line.1268"></a>
<span class="sourceLineNo">1269</span>  /**<a name="line.1269"></a>
<span class="sourceLineNo">1270</span>   * Determines whether a character is whitespace according to the latest Unicode standard, as<a name="line.1270"></a>
<span class="sourceLineNo">1271</span>   * illustrated<a name="line.1271"></a>
<span class="sourceLineNo">1272</span>   * &lt;a href="http://unicode.org/cldr/utility/list-unicodeset.jsp?a=%5Cp%7Bwhitespace%7D"&gt;here&lt;/a&gt;.<a name="line.1272"></a>
<span class="sourceLineNo">1273</span>   * This is not the same definition used by other Java APIs. (See a<a name="line.1273"></a>
<span class="sourceLineNo">1274</span>   * &lt;a href="http://spreadsheets.google.com/pub?key=pd8dAQyHbdewRsnE5x5GzKQ"&gt;comparison of several<a name="line.1274"></a>
<span class="sourceLineNo">1275</span>   * definitions of "whitespace"&lt;/a&gt;.)<a name="line.1275"></a>
<span class="sourceLineNo">1276</span>   *<a name="line.1276"></a>
<span class="sourceLineNo">1277</span>   * &lt;p&gt;&lt;b&gt;Note:&lt;/b&gt; as the Unicode definition evolves, we will modify this constant to keep it up<a name="line.1277"></a>
<span class="sourceLineNo">1278</span>   * to date.<a name="line.1278"></a>
<span class="sourceLineNo">1279</span>   */<a name="line.1279"></a>
<span class="sourceLineNo">1280</span>  public static final CharMatcher WHITESPACE = new FastMatcher("CharMatcher.WHITESPACE") {<a name="line.1280"></a>
<span class="sourceLineNo">1281</span>    /**<a name="line.1281"></a>
<span class="sourceLineNo">1282</span>     * A special-case CharMatcher for Unicode whitespace characters that is extremely<a name="line.1282"></a>
<span class="sourceLineNo">1283</span>     * efficient both in space required and in time to check for matches.<a name="line.1283"></a>
<span class="sourceLineNo">1284</span>     *<a name="line.1284"></a>
<span class="sourceLineNo">1285</span>     * Implementation details.<a name="line.1285"></a>
<span class="sourceLineNo">1286</span>     * It turns out that all current (early 2012) Unicode characters are unique modulo 79:<a name="line.1286"></a>
<span class="sourceLineNo">1287</span>     * so we can construct a lookup table of exactly 79 entries, and just check the character code<a name="line.1287"></a>
<span class="sourceLineNo">1288</span>     * mod 79, and see if that character is in the table.<a name="line.1288"></a>
<span class="sourceLineNo">1289</span>     *<a name="line.1289"></a>
<span class="sourceLineNo">1290</span>     * There is a 1 at the beginning of the table so that the null character is not listed<a name="line.1290"></a>
<span class="sourceLineNo">1291</span>     * as whitespace.<a name="line.1291"></a>
<span class="sourceLineNo">1292</span>     *<a name="line.1292"></a>
<span class="sourceLineNo">1293</span>     * Other things we tried that did not prove to be beneficial, mostly due to speed concerns:<a name="line.1293"></a>
<span class="sourceLineNo">1294</span>     *<a name="line.1294"></a>
<span class="sourceLineNo">1295</span>     *   * Binary search into the sorted list of characters, i.e., what<a name="line.1295"></a>
<span class="sourceLineNo">1296</span>     *     CharMatcher.anyOf() does&lt;/li&gt;<a name="line.1296"></a>
<span class="sourceLineNo">1297</span>     *   * Perfect hash function into a table of size 26 (using an offset table and a special<a name="line.1297"></a>
<span class="sourceLineNo">1298</span>     *     Jenkins hash function)&lt;/li&gt;<a name="line.1298"></a>
<span class="sourceLineNo">1299</span>     *   * Perfect-ish hash function that required two lookups into a single table of size 26.&lt;/li&gt;<a name="line.1299"></a>
<span class="sourceLineNo">1300</span>     *   * Using a power-of-2 sized hash table (size 64) with linear probing.&lt;/li&gt;<a name="line.1300"></a>
<span class="sourceLineNo">1301</span>     *<a name="line.1301"></a>
<span class="sourceLineNo">1302</span>     * --Christopher Swenson, February 2012.<a name="line.1302"></a>
<span class="sourceLineNo">1303</span>     */<a name="line.1303"></a>
<span class="sourceLineNo">1304</span><a name="line.1304"></a>
<span class="sourceLineNo">1305</span>    // Mod-79 lookup table.<a name="line.1305"></a>
<span class="sourceLineNo">1306</span>    private final char[] table = {1, 0, 160, 0, 0, 0, 0, 0, 0, 9, 10, 11, 12, 13, 0, 0,<a name="line.1306"></a>
<span class="sourceLineNo">1307</span>        8232, 8233, 0, 0, 0, 0, 0, 8239, 0, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,<a name="line.1307"></a>
<span class="sourceLineNo">1308</span>        12288, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 133, 8192, 8193, 8194, 8195, 8196, 8197, 8198, 8199,<a name="line.1308"></a>
<span class="sourceLineNo">1309</span>        8200, 8201, 8202, 0, 0, 0, 0, 0, 8287, 5760, 0, 0, 6158, 0, 0, 0};<a name="line.1309"></a>
<span class="sourceLineNo">1310</span><a name="line.1310"></a>
<span class="sourceLineNo">1311</span>    @Override public boolean matches(char c) {<a name="line.1311"></a>
<span class="sourceLineNo">1312</span>      return table[c % 79] == c;<a name="line.1312"></a>
<span class="sourceLineNo">1313</span>    }<a name="line.1313"></a>
<span class="sourceLineNo">1314</span>  };<a name="line.1314"></a>
<span class="sourceLineNo">1315</span>}<a name="line.1315"></a>




























































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